Species profile: Adicella reducta

August 10, 2016

Adicella reducta (McLachlan, 1865)

Adicella reducta is one of 24 members of the Family Leptoceridae found in Ireland, and is the only member of the genus Adicella. It is a species whose larvae can be found in streams, marshes, canals and rivers amongst roots of marginal vegetation and woody debris. Adicella reducta has a straight case made of a spiral of plant material. The species has no preference with regard to pH of the water.

In temperate areas, Adicella reducta has a univoltine (one generation per year) reproductive cycle, and lives for up to one year. In terms of feeding, this species predominantly a shredder, with a little grazing.

Defining features of the larvae of Adicella reducta include the lack of a hooked tarsal claw on the 2nd leg, mandibles no more than twice as long as wide, the lack of posterior-lateral projections from the mesonotum, a dark bar on the posterior of the 1st abdominal lateral sclerite, no median constriction of the tibia and tarsus of the 3rd leg, and 9th abdominal dorsum with 12 setae.

Adults of Adicella reducta can be found on the wing from May to September.

For details of records of Adicella reducta, visit the National Biodiversity Data Centre page here.

Adicella reducta


Barnard, P. and Ross, E. (2012) The Adult Trichoptera (Caddisflies) of Britain and Ireland. RES Handbook Volume 1, Part 17.

Graf, W., Murphy, J., Dahl, J., Zamora-Muñoz, C. and López-Rodríguez, M.J. (2008) Distribution and Ecological Preferences of European Freshwater Species. Volume 1: Trichoptera. Astrid Schmidt-Kloiber & Daniel Hering (eds). Pensoft, Sofia-Moscow.

O’Connor, J.P. (2015) A Catalogue and Atlas of the Caddisflies (Trichoptera) of Ireland. Occasional Publication of the Irish Biogeographical Society, No. 11.

Wallace, I.D., Wallace, B. and Philipson, G.N. (2003) Keys to the Case-bearing Caddis Larvae of Britain and Ireland. Scientific Publication of the Freshwater Biological Association No. 61.

Last updated: 09/04/2018


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